The United States Navy (USN) is the naval warfare service of the United States and has played an important role in the nation’s history since the American Revolutionary War. Its origins date back to the Continental Navy, established by the Continental Congress in 1775. Although the Continental Navy was disbanded after the Revolutionary War, the United States established a permanent navy in 1794.
From the sailing frigates of the early republic to modern aircraft carriers, submarines, destroyers and amphibious ships, the United States Navy has undergone major changes in technology, ship design and naval warfare. Its vessels have served in conflicts ranging from the War of 1812 and the American Civil War to the two World Wars, the Cold War and more recent military operations.
Historic Warships documents the development of the United States Navy through its history, warships and ship classes. Explore the United States Navy Historical Timeline for a chronological overview, or discover individual warships through our dedicated sections on aircraft carriers, battleships, cruisers, destroyers, frigates, submarines, monitors and other naval vessels.
History of the United States Navy
The history of the United States Navy began during the American Revolutionary War. On October 13, 1775, the Continental Congress authorized the establishment of a Continental Navy to operate against British forces. In addition to naval vessels, privately owned armed ships known as privateers played an important role in disrupting British maritime trade.
Following American independence in 1783, the Continental Navy was disbanded. However, growing concerns about maritime security and attacks on American merchant shipping, particularly by Barbary corsairs, led Congress to authorize the construction of six frigates in 1794. These ships formed the foundation of the permanent United States Navy.
During the nineteenth century, the Navy evolved from a relatively small sailing fleet into a modernizing force. The War of 1812 demonstrated the capabilities of American warships, while the American Civil War brought major technological changes. Ironclad warships, steam propulsion, naval mines and experimental submarines transformed naval warfare and influenced the design of future fleets.
In the late nineteenth century, the United States began a major programme of naval expansion. Wooden sailing warships were gradually replaced by steel-hulled vessels powered by steam. Improvements in armor, naval artillery and propulsion led to the development of a modern steel navy, capable of operating far beyond American coastal waters.
The First World War accelerated the development of naval aviation, destroyers and anti-submarine warfare. During the Second World War, aircraft carriers became central to American naval operations, particularly in the Pacific. Submarines, destroyers, cruisers, battleships and amphibious ships also played important roles in the conflict.
After 1945, the United States Navy entered the nuclear age. Nuclear-powered submarines, beginning with USS Nautilus in 1954, and later nuclear-powered aircraft carriers transformed the Navy’s capabilities. During the Cold War, the fleet played a central role in American maritime strategy, deterrence and global military operations.
Since the end of the Cold War, the United States Navy has continued to adapt to changing strategic requirements and technological developments. Modern operations rely on aircraft carriers, nuclear-powered submarines, guided-missile destroyers, amphibious ships and a wide range of support vessels.
Today, the United States Navy remains one of the world’s leading naval forces. Its history illustrates the transformation of naval warfare from the age of sail to an era characterized by nuclear propulsion, naval aviation, guided missiles and advanced maritime technology.
US Navy Timeline
The history of the United States Navy spans more than two centuries, from the establishment of the Continental Navy in 1775 to the modern fleet.
Our United States Navy Historical Timeline presents this development in chronological order, highlighting important events, technological innovations, naval conflicts and the warships that shaped the Navy throughout its history.
From the sailing frigates of the Revolutionary War and the ironclads of the American Civil War to the aircraft carriers and submarines of the twentieth century, the timeline explores the evolution of American naval power across successive historical periods.
Explore the United States Navy Historical Timeline →
US Navy Warship Types
Throughout its history, the United States Navy has operated a wide variety of warships, reflecting changes in naval technology, ship design and the demands of maritime warfare. From the sailing frigates of the early Navy to modern nuclear-powered aircraft carriers and submarines, each generation of vessels has served different operational needs.
The roles of individual warship types have also evolved over time. Battleships and cruisers once formed a major part of the fleet’s surface combat power, while aircraft carriers and submarines became increasingly important during the twentieth century. Destroyers and frigates performed escort and fleet-protection duties, while amphibious and auxiliary vessels supported naval operations at sea and ashore.
Explore the main types of warships operated by the United States Navy below, and discover the ships and classes associated with each category.
Monitors
Monitors were low-freeboard armored warships, often equipped with rotating gun turrets. They played an important role during the American Civil War and in the subsequent development of armored coastal-defense vessels in the US Navy.
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Aircraft Carriers
Aircraft carriers are warships designed to operate military aircraft at sea. Since the Second World War, carrier aviation has become a central element of US Navy operations, providing air power, fleet defense and support for military operations around the world.
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Battleships
Battleships were heavily armed and armored warships designed primarily for combat against major surface vessels. The US Navy operated battleships from the age of sail through the twentieth century, with the Iowa class representing the final generation of American battleships.
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Cruisers
Cruisers evolved from sailing and armored cruisers into powerful steel-hulled surface combatants. During the twentieth century, they performed fleet-escort, surface-warfare and shore-bombardment roles, while later guided-missile cruisers added air-defense and missile capabilities.
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Destroyers
Originally developed to counter torpedo boats, destroyers evolved into versatile warships capable of escorting fleets, conducting anti-submarine warfare, defending against aircraft and missiles, and engaging surface targets. They remain an important component of the modern US Navy.
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Frigates and Destroyer escorts
Frigates and destroyer escorts have played important roles in protecting merchant shipping and naval formations, particularly against submarine threats. The US Navy operated large numbers of destroyer escorts during the Second World War, followed by several generations of ocean-going frigates during the Cold War.
Explore US Navy Frigates and Destroyer Escorts →
Submarines
US Navy submarines have evolved from early experimental vessels into highly capable platforms for reconnaissance, anti-submarine warfare and attacks on enemy shipping and land targets. Nuclear propulsion transformed submarine endurance and led to the development of nuclear-powered attack and ballistic-missile submarines.
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Amphibious Ships
Amphibious ships transport and support troops, vehicles, landing craft and aircraft during operations from sea to shore. The US Navy has operated a wide range of amphibious vessels, from landing ships and transports to modern amphibious assault ships.
Explore US Navy Amphibious Ships →
Auxiliary and Support Ships
Auxiliary and support ships provide the fuel, supplies, maintenance, transport and specialist services required to sustain naval operations. Tankers, tenders, repair ships and other support vessels have enabled the US Navy to maintain its fleet and operate over long distances.
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US Navy Ship Prefixes
United States Navy ships may be identified by prefixes placed before their names. These designations help distinguish commissioned naval vessels from ships operated by other branches of the US government or by civilian organizations.
The best-known prefix is USS, which stands for United States Ship. It is used for commissioned ships of the United States Navy. Examples include USS Constitution, USS Iowa (BB-61) and USS Enterprise (CV-6).
Another designation is USNS, meaning United States Naval Ship. It is used for certain vessels operated by the Military Sealift Command that are not commissioned as United States Navy ships. These vessels perform important support functions, including transportation, logistics and replenishment at sea.
The use of ship prefixes has varied over time. Historical records may omit prefixes or use different naming conventions, particularly when referring to older vessels.
Common US Navy Ship Prefixes
Prefix | Meaning | Use |
USS | Unites States Ship | Commissioned ships of the United States Navy |
USNS | United States Naval | Ship Ships operated by the Military Sealift Command |
The ship prefix should not be confused with the hull classification symbol and hull number, which identify a vessel’s type and its individual designation within that classification.
For example, in USS Iowa (BB-61), USS is the ship prefix, BB is the battleship classification symbol, and 61 is the hull number.
On Historic Warships, ship names are presented with their appropriate designations where applicable, helping readers identify vessels and understand their place in the history of the United States Navy.
US Navy Hull Classification System
The United States Navy uses a system of hull classification symbols and hull numbers to identify its ships and distinguish between different types of vessels. The system helps identify a ship’s general role and provides a unique designation within its classification.
The modern system was formally introduced in 1920. Since then, classification symbols have changed as new types of warships have been developed and older types have disappeared. Some symbols are still used today, while others are mainly encountered in historical records.
A ship’s designation normally consists of a classification symbol followed by a number. For example, BB-61 identifies a battleship, while CVN-78 identifies a nuclear-powered aircraft carrier.
Historical Hull Classification Symbols
Many historical symbols are important for understanding US Navy warships from the twentieth century, particularly those that served during the Second World War and the Cold War.
Symbol | Meaning | Historical Use |
BB | Battleship | Battleships, including the Iowa class |
CA | Heavy cruiser | Heavy cruisers, such as USS Indianapolis (CA-35) |
CL | Light cruiser | Light cruisers |
CV | Aircraft Carrier | Conventional aircraft carriers |
CVE | Escort Aircraft Carrier | Smaller carriers used for escort and support duties |
CVL | Light Aircraft Carrier | Smaller aircraft carriers |
DD | Destroyer | Destroyers used for escort, fleet protection and attack |
DE | Destroyer escort | Escort vessels, particularly prominent during the Second World War |
FF | Frigate | Frigates, including Cold War-era guided-missile frigates |
SS | Submarine | Conventionally powered submarines in the general classification system |
SSN | Nuclear-powered attack submarine | Nuclear-powered submarines designed primarily for attack and other military missions |
SSBN | Ballistic-missile submarine | Submarines designed to carry submarine-launched ballistic missiles |
These symbols do not all represent current ship categories. Some, such as BB, CA, CL, CVE and CVL, are primarily encountered in historical references. The Navy’s classification system has evolved over time, and a symbol’s precise meaning depends on the period in which it was used.
Modern US Navy Hull Classification Symbols
Modern US Navy ships use classification symbols that reflect their principal role, propulsion or capabilities. The following table lists important examples.
Symbol | Type of vessel | Historical Use |
CVN | Nuclear-powered aircraft carrier | Operating carrier-based aircraft and supporting fleet operations |
CG | Guided-missile cruiser | ir defense and other fleet combat missions |
DDG | Guided-missile destroyer | Air defense, anti-submarine warfare and surface or land attack |
SSN | Nuclear-powered attack submarine | Anti-submarine warfare, intelligence gathering and attack missions |
SSBN | Ballistic-missile submarine | Strategic nuclear deterrence |
SSGN | Guided-missile submarine | Conventional strike missions and other specialized operations |
LHA | mphibious assault ship | Embarked aircraft, troops and amphibious operations |
LHD | Amphibious assault ship | Amphibious operations using aircraft, landing craft and embarked forces |
LPD | CAmphibious transport dock | Transporting troops, vehicles, landing craft and equipment |
LSD | Dock landing ship | Transporting and deploying landing craft and amphibious equipment |
LCS | Littoral combat ship | Operations in coastal waters and other mission-specific tasks |
MCM | Mine countermeasures ship | Detecting and clearing naval mines |
The table includes both current and historical designations. The status and use of individual classifications can change as ships are commissioned, reclassified or retired.
Reading a US Navy Ship Designation
A US Navy ship designation is easier to understand when its different parts are considered separately.
Example: USS Iowa (BB-61)
USS — United States Ship, the prefix used for a commissioned US Navy ship.
BB — the hull classification symbol for a battleship.
61 — the hull number assigned to that ship within the classification system.
Iowa — the name of the ship.
Example: USS Gerald R. Ford (CVN-78)
USS — United States Ship.
CVN — nuclear-powered aircraft carrier.
78 — the ship’s hull number.
Gerald R. Ford — the name of the ship.
Example: USS Arleigh Burke (DDG-51)
USS — United States Ship.
DDG — guided-missile destroyer.
51 — the ship’s hull number.
Arleigh Burke — the name of the ship.
The hull number is an identification number, not necessarily the number of ships currently in service or the total number of ships of that type ever built. Numbers may also be retained when a ship is reclassified, and historical numbering practices have changed over time.
The ship prefix and hull classification serve different purposes. The prefix indicates the ship’s status, while the classification symbol and number identify its type and individual designation.
Understanding these designations makes it easier to identify US Navy vessels in historical photographs, ship lists, technical records and accounts of naval operations.